Using V1.11.0-rc1 Running self hosted on Ubuntu 16.04.5 LTSemails to CLIENTS work just fine. Email to AGENTS give the following message inside the ticket and email never gets to agent. Address not found ** Your message wasn't delivered to saffle@localhost because the domain localhost couldn't be found. Check
for typos or unnecessary spaces and try again. The response was: DNS
Error: 11155443 DNS type 'mx' lookup of localhost responded with code
NXDOMAIN Domain name not found: localhostAll was working fine before on V1.10 before the upgrade. All settings look ok in SMTP settings and the diagnostic sends the email to the agent just fine.